This is incredibly stupid. Historically, it is in error, as the so-called Barbarians did quite well preserving Roman heritage through adaptation, even envy, of Roman systems of political economy, social organization, and cultural wealth. But more importantly, this will not occur. A call to hive off and preserve a way of life is only possible with tectonic sociological shifts (and I'm ignoring the fact that Dreher's "conservative Christian" is not a unified sociological body, let alone concept). The Jews only persevered so distinctly because of the Ghetto foisted upon them in Europe, and a conceptual Dhimmitude in Muslim dominated lands. Reactionary paranoia aside, I don't think this will happen.
However, what will happen is that this Traditionalism will remain an ardent critic of the regime, whatever it is, while forfeiting everything functionally. That is to say, they will be squeaky gears in the machine. Or in other words, they will be grumblers, but well adjusted members of society. The pseudo-eschatology of a renewed Christendom will never come to pass, and in a hundred years or so, the gap between Dreher's generation and a future generation of conservatives will be wildly different.
Carl Schmitt, a conservative, even a counter-revolutionary, political theorist and jurist, explains this phenomenon, as it played out post-French Revolution:
The Restoration fought the activist spirit of the French Revolution with ideas such as tradition and custom and with the belief that history progresses slowly. Ideas of that sort could have led to a complete negation of natural reason and to an absolute moralistic passivity that would have considered becoming active altogether evil[...]In the final analysis, extreme traditionalism actually meant an irrational rejection of every intellectually conscious decisionIn other words, this kind of conservatism maintains a kind of pathetic, heel-dragging, existence. Neither Human history (i.e. Revolutionary moments), nor evolutionary biology (i.e. punctuated equilibrium) pans out for this sort of strained resistance. And Biblical notions of providence certainly do not reveal this, though the Bible is usually the last resort for these cultural-conservative Christians, a deposit of proof-texts. It won't last even as it is groaning under the weight of greater and great strains of change.
I'm not a conservative, at least not in the cultural or socio-political sense I've described above, but the Benedict Option is silly for any serious conservative. It makes more sense to hitch a wagon to Donald Trump or (dare I say it!) Hillary Clinton in an attempt to steer or pressure these elements to preserve a particular vision of the American Empire they are all committed to. But I suppose every generation needs a gaggle of political buffoons, false prophets who fall over themselves.
Christ, our God, save us from this foolishness!